External cam lock



FIG. 1 is a perspective view of an external cam lock showing my new design;

FIG. 2 is a top view of thereof;

FIG. 3 is a rear view of thereof;

FIG. 4 is a front view of thereof;

FIG. 5 is a side view of thereof;

FIG. 6 is a side view of thereof; and,

FIG. 7 is a bottom view thereof.

The broken lines are for illustrative purpose only and form no part of the claimed design. 

The ornamental design for an external cam lock, as shown and described. 